path: root/drivers/isdn/hardware/mISDN/avmfritz.c

/*
 * avm_fritz.c    low level stuff for AVM FRITZ!CARD PCI ISDN cards
 *                Thanks to AVM, Berlin for informations
 *
 * Author       Karsten Keil <keil@isdn4linux.de>
 *
 * Copyright 2009  by Karsten Keil <keil@isdn4linux.de>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/mISDNhw.h>
#include <linux/slab.h>
#include <asm/unaligned.h>
#include "ipac.h"


#define AVMFRITZ_REV	"2.3"

static int AVM_cnt;
static int debug;

enum {
	AVM_FRITZ_PCI,
	AVM_FRITZ_PCIV2,
};

#define HDLC_FIFO		0x0
#define HDLC_STATUS		0x4
#define CHIP_WINDOW		0x10

#define CHIP_INDEX		0x4
#define AVM_HDLC_1		0x00
#define AVM_HDLC_2		0x01
#define AVM_ISAC_FIFO		0x02
#define AVM_ISAC_REG_LOW	0x04
#define AVM_ISAC_REG_HIGH	0x06

#define AVM_STATUS0_IRQ_ISAC	0x01
#define AVM_STATUS0_IRQ_HDLC	0x02
#define AVM_STATUS0_IRQ_TIMER	0x04
#define AVM_STATUS0_IRQ_MASK	0x07

#define AVM_STATUS0_RESET	0x01
#define AVM_STATUS0_DIS_TIMER	0x02
#define AVM_STATUS0_RES_TIMER	0x04
#define AVM_STATUS0_ENA_IRQ	0x08
#define AVM_STATUS0_TESTBIT	0x10

#define AVM_STATUS1_INT_SEL	0x0f
#define AVM_STATUS1_ENA_IOM	0x80

#define HDLC_MODE_ITF_FLG	0x01
#define HDLC_MODE_TRANS		0x02
#define HDLC_MODE_CCR_7		0x04
#define HDLC_MODE_CCR_16	0x08
#define HDLC_FIFO_SIZE_128	0x20
#define HDLC_MODE_TESTLOOP	0x80

#define HDLC_INT_XPR		0x80
#define HDLC_INT_XDU		0x40
#define HDLC_INT_RPR		0x20
#define HDLC_INT_MASK		0xE0

#define HDLC_STAT_RME		0x01
#define HDLC_STAT_RDO		0x10
#define HDLC_STAT_CRCVFRRAB	0x0E
#define HDLC_STAT_CRCVFR	0x06
#define HDLC_STAT_RML_MASK_V1	0x3f00
#define HDLC_STAT_RML_MASK_V2	0x7f00

#define HDLC_CMD_XRS		0x80
#define HDLC_CMD_XME		0x01
#define HDLC_CMD_RRS		0x20
#define HDLC_CMD_XML_MASK	0x3f00

#define HDLC_FIFO_SIZE_V1	32
#define HDLC_FIFO_SIZE_V2	128

/* Fritz PCI v2.0 */

#define AVM_HDLC_FIFO_1		0x10
#define AVM_HDLC_FIFO_2		0x18

#define AVM_HDLC_STATUS_1	0x14
#define AVM_HDLC_STATUS_2	0x1c

#define AVM_ISACX_INDEX		0x04
#define AVM_ISACX_DATA		0x08

/* data struct */
#define LOG_SIZE		63

struct hdlc_stat_reg {
#ifdef __BIG_ENDIAN
	u8 fill;
	u8 mode;
	u8 xml;
	u8 cmd;
#else
	u8 cmd;
	u8 xml;
	u8 mode;
	u8 fill;
#endif
} __attribute__((packed));

struct hdlc_hw {
	union {
		u32 ctrl;
		struct hdlc_stat_reg sr;
	} ctrl;
	u32 stat;
};

struct fritzcard {
	struct list_head	list;
	struct pci_dev		*pdev;
	char			name[MISDN_MAX_IDLEN];
	u8			type;
	u8			ctrlreg;
	u16			irq;
	u32			irqcnt;
	u32			addr;
	spinlock_t		lock; /* hw lock */
	struct isac_hw		isac;
	struct hdlc_hw		hdlc[2];
	struct bchannel		bch[2];
	char			log[LOG_SIZE + 1];
};

static LIST_HEAD(Cards);
static DEFINE_RWLOCK(card_lock); /* protect Cards */

static void
_set_debug(struct fritzcard *card)
{
	card->isac.dch.debug = debug;
	card->bch[0].debug = debug;
	card->bch[1].debug = debug;
}

static int
set_debug(const char *val, struct kernel_param *kp)
{
	int ret;
	struct fritzcard *card;

	ret = param_set_uint(val, kp);
	if (!ret) {
		read_lock(&card_lock);
		list_for_each_entry(card, &Cards, list)
			_set_debug(card);
		read_unlock(&card_lock);
	}
	return ret;
}

MODULE_AUTHOR("Karsten Keil");
MODULE_LICENSE("GPL v2");
MODULE_VERSION(AVMFRITZ_REV);
module_param_call(debug, set_debug, param_get_uint, &debug, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "avmfritz debug mask");

/* Interface functions */

static u8
ReadISAC_V1(void *p, u8 offset)
{
	struct fritzcard<